#!/usr/bin/env ruby

require 'json'

main_report_file = ARGV.shift
unless main_report_file
  puts 'usage: merge_reports <main-report> [extra reports...]'
  exit 1
end

puts "Loading #{main_report_file}..."
main_report = JSON.parse(File.read(main_report_file))
new_report = main_report.dup

ARGV.each do |report_file|
  report = JSON.parse(File.read(report_file))

  # Remove existing values
  updates = report.delete_if do |key, value|
    main_report[key] && main_report[key] == value
  end
  new_report.merge!(updates)

  puts "Merged #{report_file} adding #{updates.size} results."
end

File.write(main_report_file, JSON.pretty_generate(new_report))
puts "Saved #{main_report_file}."
